Dryer with universal voltage controller
First Claim
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1. A hand dryer configured to accept multiple voltage inputs, the hand dryer comprising:
- a blower vacuum motor for producing output air;
a heating element for heating the output air, the heating element comprising a plurality of resistors configured to form a plurality of resistive circuits, each of the plurality of resistive circuits in one of series and parallel with the blower vacuum motor; and
a voltage controller for selecting a nominal voltage supplied to the blower vacuum motor via the plurality of resistors of the heating element, the voltage controller selecting the nominal voltage based on an input voltage by operating one or more relays to independently select one of the plurality of resistive circuits.
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Abstract
A hand dryer comprising a universal brushed AC blower vacuum motor, one or more resistive circuits of a heating element, and a universal voltage controller that selectively alternates the configuration and the electrical connection of the resistive circuits, in response to a detected input voltage is disclosed.
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Citations
20 Claims
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1. A hand dryer configured to accept multiple voltage inputs, the hand dryer comprising:
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a blower vacuum motor for producing output air; a heating element for heating the output air, the heating element comprising a plurality of resistors configured to form a plurality of resistive circuits, each of the plurality of resistive circuits in one of series and parallel with the blower vacuum motor; and a voltage controller for selecting a nominal voltage supplied to the blower vacuum motor via the plurality of resistors of the heating element, the voltage controller selecting the nominal voltage based on an input voltage by operating one or more relays to independently select one of the plurality of resistive circuits. - View Dependent Claims (2)
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3. A hand dryer configured to accept multiple voltage inputs, the hand dryer comprising:
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a blower vacuum motor for producing output air; a heating element for heating the output air, the heating element comprising a first resistor and a second resistor; a voltage controller for selecting a nominal voltage supplied to the blower vacuum motor, the voltage controller selecting the nominal voltage based on an input voltage by operation of one or more relays to select a first resistive circuit, a second resistive circuit, or a third resistive circuit; the first resistive circuit has the first resistor and the second resistor in series with each other and in parallel with the blower vacuum motor; the second resistive circuit has the first resistor in series with the blower vacuum motor and the second resistor is not in series with the blower vacuum motor; and the third resistive circuit has the first resistor and the second resistor in series with the blower vacuum motor. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. The hand dryer comprising:
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a blower vacuum motor for producing output air, the blower vacuum motor having a dynamic resistance; a heating element for heating the output air, the heating element comprising a first resistor and a second resistor; a voltage controller for selecting a nominal voltage supplied to the blower vacuum motor, the voltage controller selecting the nominal voltage based on an input voltage by operation of one or more relays to select a first resistive circuit, a second resistive circuit or a third resistive circuit; the first resistive circuit has the first resistor and the second resistor in series with each other and in parallel with the blower vacuum motor; the second resistive circuit has the first resistor in series with the blower vacuum motor and the second resistor is not in series with the blower vacuum motor and the second resistive circuit has about a 0.7;
1 resistance ration with the dynamic resistance of the blower vacuum motor; andthe third resistive circuit has the first resistor and the second resistor in series with the blower vacuum motor and the third resistive circuit has about a 1;
1 resistance ratio with the dynamic resistance of the blower vacuum motor. - View Dependent Claims (17, 18, 19, 20)
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Specification